CVE-2026-89863 scsi: qla2xxx: edif: Fix NULL pointer deref in RX SA delete check
A NULL pointer dereference in the qla2xxx EDIF driver allows a local attacker to crash the Linux kernel via a crafted SCSI command completion.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89863?
CVE-2026-89863 is a high-severity vulnerability in Linux, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: edif: Fix NULL pointer deref in RX SA delete check
qla_chk_edif_rx_sa_delete_pending() obtains the SCSI command via GET_CMD_SP(sp) and immediately dereferences cmd->sc_data_direction. That command pointer can be NULL: the firmware may post a status completion for a command that has already been returned or aborted. The caller qla2x00_status_entry() acknowledges this on the very same status path, re-fetching GET_CMD_SP(sp) and bailing out with the "Command already returned" message when it is NULL -- but that check runs only after qla_chk_edif_rx_sa_delete_pending() has already dereferenced the pointer, so a NULL cmd crashes the kernel in interrupt context.
Return early when cmd is NULL, before touching cmd->sc_data_direction.
Which versions are affected by CVE-2026-89863?
How do I fix CVE-2026-89863?
Apply the vendor's patch.
Is CVE-2026-89863 being exploited?
There is no known exploitation of CVE-2026-89863 in the wild and no public exploit code.
Sources
Also known as AZL-101457, BELL-CVE-2026-89863, DEBIAN-CVE-2026-89863, GHSA-43g8-fhx4-jf78, UBUNTU-CVE-2026-89863.